How to connect a dual coil relay ?

[stregoi]

Hi, i am a very beginner in electronics, i am trying to make this circuit below. So when i push the first pushbutton, the motor should turn, and when i push the second push button the motor should turn in reverse.
as i can see from the schematics, they used a single coil DPDT, with 8 poles ( i think ) ... but i have a dual coil DPDT, with 10 poles ( TQ2-2L-5V ).
how can i use my DPDT relay instead of the one shown in the schmatics, i tried really, i cannot figure it out.
thanks

 

[cowboybob]

Welcome to ETO, stregoi!

Not at all sure if the relay will handle the motor current needs. I suppose you could use 5Vdc to both coils (rather than 12) without the 180 ohm resistor.

And, I've never seen a relay like this. The datasheet is here--> https://pdf1.alldatasheet.com/datasheet-pdf/view/509925/PANASONIC/TQ2L25V.html

 

[eTech]

Hi, i am a very beginner in electronics, i am trying to make this circuit below. So when i push the first pushbutton, the motor should turn, and when i push the second push button the motor should turn in reverse.
as i can see from the schematics, they used a single coil DPDT, with 8 poles ( i think ) ... but i have a dual coil DPDT, with 10 poles ( TQ2-2L-5V ).
how can i use my DPDT relay instead of the one shown in the schmatics, i tried really, i cannot figure it out.
thanks

hi

It looks like the buttons in the schematic are momentary and the relay is a standard dpdt relay.

As long as the forward button is pressed (held down), the motor runs forward. The relay does not energize.
When the reverse button is pressed(held down), the relay energizes, contacts switch, and the motor runs reverse.

The relay you have is a DPDT latching relay, meaning, when one coil is energized, the contact will stay in its operated position until
the other coil is energized. The contacts will remain in their last operated position even if power is removed from the coil(s).

Link to relay:
https://www3.panasonic.biz/ac/e_download/control/relay/signal/catalog/mech_eng_tq.pdf

What kind of motor is that? Part number?

eT

 

[KeepItSimpleStupid]

Well, almost right: Dual coil magnetic latching relay requires a pulse of the proper polarity for set and reset. They maintain their position after a power failure. Revering the suggested polarity, reverses it's function. e.g +12 V pulse for set. -12 V pulse for reset.

 

[eTech]

Well, almost right: Dual coil magnetic latching relay requires a pulse of the proper polarity for set and reset. They maintain their position after a power failure. Revering the suggested polarity, reverses it's function. e.g +12 V pulse for set. -12 V pulse for reset.

We'll...I think that's true for single coil latching but the dual coils in this relay have independent terminal connections. So don't necessarily need to reverse polarity.

eT

 

[KeepItSimpleStupid]

No, it's just an option. e.g. a dual coil magnetic latching relay behaves like a single coil latching relay if you don't use one of the coils. e.g. polarity reversal, reverses state.